Meaning of fairy-tale ending in English:
fairy-tale ending
noun
A perfect, happy, often simplistic ending or resolution to a story, resembling those often found in fairy tales; also in extended use.
Frequently with reference to the convention of ending fairy tales with formulaic phrases affirming the continued happiness of the protagonists.
Origin
Mid 19th century; earliest use found in Household Words.
Are You Learning English? Here Are Our Top English Tips